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DIN504

Durable Bearings

In all areas of mechanical and plant engineering, plain bearings according to DIN 502 to DIN 506 can be found. The applications of these bearings are unlimited, with a sliding speed of up to 1.5 m/s, allowing for diverse possibilities. The bearing housing is manufactured from high-quality gray cast iron of grade GG 25. The structural design of the housing enables high loads and reliable operational safety. Optionally, plain bearings according to DIN 502 to DIN 504 are available with or without red brass bushing, complying with DIN 8221. For additional applications, materials such as bronze, bronze with solid lubricant reservoir, plastic, or composite materials are also available. For cover bearings according to DIN 506, gray cast iron bearing shells are available, allowing for usage even at high temperatures. The bore tolerance for all bearings is D10.

Technical Specification

Design & Material

- Type: Unsplit plain bearings
- Standard: Conforming to DIN 504
- Standard Material: Grey Cast Iron GG20 (EN-GJL-200)
- Standard Material: Red Brass (Rg7)
- Bushing Standard: Manufactured according to DIN 8221

Applications & Performance

- Applications: Commonly employed across a range of industries, including:
- Wood processing
- Steel manufacturing
- Chemical plants
- Food processing
- Sliding Speed: Suitable for sliding speeds up to approximately 1.5 m/s,
depending on operational conditions
- Operating Conditions: Designed to operate under various industrial environments, ensuring reliable performance even in demanding conditions

Design Features

- Housing: Manufactured from grey cast iron GG20, offering strength, wear resistance, and durability
- Bushings: Made from red brass (Rg7), ensuring low friction, high wear resistance, and long service life
Complies with DIN 8221, guaranteeing dimensional consistency and reliable performance

Lubrication & Maintenance

- Lubrication Requirements: Requires proper lubrication (grease or oil) for smooth operation and minimized wear
- Maintenance: Regular lubrication and maintenance are recommended to optimize the performance and extend the life of the bearings

25
140
In the DIN504 pillow block housings, bearings with a shaft diameter ranging from 25 to 140 mm can be accommodated.

Pressure Guidelines

Maximum allowable compaction pressures depend on various factors including material compatibility, surface roughness, shaft dimensions, bearing clearance, alignment quality, load direction, lubrication status, and bearing temperature. Guide values for specific compaction pressures should not be exceeded under normal operating conditions. This includes shaft diameter within tolerance zone h9, surface roughness of Ra ≤ 5μm, and adequate lubrication. Maximum sliding speed: v = 1.5 m/s, frictional power: PR = F·v·μ, where F is the bearing load (N), v is the sliding speed (m/s), and μ is the coefficient of friction.

Technical Specification

Technical Data

- Standard (Housing): DIN 504
- Standard (Bushing): DIN 8221
- Material (Housing): Grey Cast Iron GG20 (EN-GJL-200)
- Material (Bushing): Red Brass (Rg7)
- Sliding Speed: Up to 1.5 m/s
- Applications: Wood processing, steel manufacturing, chemical plants, food processing
- Lubrication: Grease or oil lubrication is recommended

Key Features & Benefits

- Versatile Applications: Suitable for industries such as wood processing, steel manufacturing, chemical plants, and food processing
- Robust & Durable: Grey cast iron housing (GG20) combined with red brass bushings (Rg7) offers excellent strength and wear resistance
- Optimal Performance: Designed for sliding speeds up to 1.5 m/s under varying operational conditions
- Extended Service Life: High wear resistance and low friction ensure a long service life, even under heavy use
- Corrosion Resistance: Red brass bushings provide superior corrosion resistance, making the bearings suitable for harsh environments

Benefits

Versatile and Reliable

The sliding bearings according to DIN 502 to 506 offer versatile applications in industries such as wood, steel, chemicals, and food. With high load capacity and sliding speeds of up to 1.5 m/s, they are suitable for demanding applications like cutting head excavators and ship propulsion. The robust housings made of high-quality cast iron EN-GJL (GG) provide stability, while optional bearing shells allow for individual adjustments. Precise bearing bores meet various tolerance requirements. Efficient lubricant supply is ensured through various methods such as grease nipples, hand grease guns, and central lubrication systems. With an average grease consumption of about 20 g/m2h under normal conditions, these sliding bearings are a reliable solution for various applications.

Red bronze (RG7)

350 P (N/cm2)
180 p.v (N/cm2) * (m/s)

Cast bronze

450 P (N/cm2)
260 p.v (N/cm2) * (m/s)

Design limits for plain bearings should not exceed specified values, considering factors like material pairing, surface conditions, lubrication, and operating conditions

Material

Features of RG7

Rg7 is a sliding material with moderate hardness, manufactured through centrifugal or continuous casting processes. Despite its good emergency running properties, it provides sufficient wear resistance. Due to its dezincification-resistant properties, this alloy is preferred and practically immune to stress corrosion cracking

Mechanical properties
Up to

250-310MPa

Tensile strength
Up to

8-12%

Elongation at break
Up to

70-90MPa

Yield strength
Up to

70-90HB

Brinell hardness
The plain bearings are made from RG7 red bronze as standard

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DIN502
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Plain bearings according to DIN 502 to
DIN 506 widely used in mechanical and plant engineering

Applications of these bearings unlimited,
with sliding speed of up to 1.5 m/s

Bearing housing manufactured from
high-quality gray cast iron of grade GG 25

Structural design of housing enables
high loads and reliable operational safety

Plain bearings available with or
without red brass bushing, complying with DIN 8221

Optional materials include bronze, bronze with solid lubricant reservoir, plastic, or composite materials

For cover bearings according to DIN 506, gray cast iron bearing shells available, suitable for usage even at high temperatures

Bore tolerance for all bearings is D10

Plain bearings according to DIN 502 to
DIN 506 widely used in mechanical and plant engineering

Applications of these bearings unlimited,
with sliding speed of up to 1.5 m/s

Bearing housing manufactured from
high-quality gray cast iron of grade GG 25

Structural design of housing enables
high loads and reliable operational safety

Plain bearings available with or
without red brass bushing, complying with DIN 8221

Optional materials include bronze, bronze with solid lubricant reservoir, plastic, or composite materials

For cover bearings according to DIN 506, gray cast iron bearing shells available, suitable for usage even at high temperatures

Bore tolerance for all bearings is D10

Plain bearings according to DIN 502 to
DIN 506 widely used in mechanical and plant engineering

Applications of these bearings unlimited,
with sliding speed of up to 1.5 m/s

Bearing housing manufactured from
high-quality gray cast iron of grade GG 25

Structural design of housing enables
high loads and reliable operational safety

Plain bearings available with or
without red brass bushing, complying with DIN 8221

Optional materials include bronze, bronze with solid lubricant reservoir, plastic, or composite materials

For cover bearings according to DIN 506, gray cast iron bearing shells available, suitable for usage even at high temperatures

Bore tolerance for all bearings is D10

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